It looks like there's plenty of seperation to me. Three things cross the boundary: The main controller has an isolated primary/secondary side, so it's fine for

It looks like there's plenty of seperation to me. Three things cross the boundary: The main controller has an isolated primary/secondary side, so it's fine for it to bridge. According to the datasheet it's got >4kV of isolation. The big yellow thing is a transformer, but it's switched at high frequency; this is quite common in this kind of thing. Note that the secondary wires coming out of the top are properly insulated, so this should be quite well isolated. The class-Y capacitor is designed for exactly this purpose.